SPILL PREVENTION, CONTROL AND COUNTERMEASURE PLAN LOWER BAKER GENERATION PLANT BAKER DAM ROAD CONCRETE, WASHINGTON AUGUST 25, 2008

SPILL PREVENTION, CONTROL AND COUNTERMEASURE PLAN LOWER BAKER GENERATION PLANT 47256 BAKER DAM ROAD CONCRETE, WASHINGTON AUGUST 25, 2008 FOR PUGET SOUND ENERGY File No. 0186-634-03

August 25, 2008 Puget Sound Energy P.O. Box 90868 PSE-11N Bellevue, Washington 98009-0868 Attention: John Rork Subject: Spill Prevention, Control and Countermeasure Plan Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington File No. 0186-634-03 GeoEngineers is pleased to submit the Draft Spill Prevention, Control and Countermeasure (SPCC) Plan for Puget Sound Energy, Lower Baker Generation Plant, 47256 Baker Dam Road, Concrete, Washington. Our services were completed in general accordance with our agreement with Puget Sound Energy (Contract No. 4600001763). This SPCC Plan has been prepared for the exclusive use of Puget Sound Energy, their authorized agents and regulatory agencies. This Plan is not intended for use by others, and the information contained herein is not applicable to other sites. Within the limitations of scope, schedule, and budget, our services have been executed in accordance with the generally accepted engineering practices for SPCC plans in this area at the time this Plan was prepared. No warranty or other conditions express or implied should be understood. We appreciate the opportunity to assist Puget Sound Energy on this project. Please contact us if you have questions regarding this report. Yours very truly, GeoEngineers, Inc. Kurt R. Fraese, LG Principal TCM:KRF:tt TACO:\0\0186634\03\Finals\018663403SPCCPlan_LowerBaker.doc

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 SPILL PREVENTION CONTROL AND COUNTERMEASURE PLAN SPCC PLAN REVIEW AND AMENDMENT (PART 112.5) In accordance with 40 CFR Part 112.5(b), a review and evaluation of this SPCC Plan will be conducted at least once every five years. As a result of this review and evaluation, Puget Sound Energy will amend the SPCC Plan within six months of the review to include more effective prevention and control technology if: (1) such technology will significantly reduce the likelihood of a spill event from the facility, and (2) such technology has been field-proven at the time of review. Any amendment to the SPCC Plan shall be certified by a Professional Engineer within six months after a change in the facility design, construction, operation, or maintenance occurs which materially affects the facility s potential for the discharge of oil into or upon the navigable waters of the United States or adjoining shorelines. The undersigned individuals have completed a review and evaluation of the SPCC Plan for the Lower Baker Generation Plant, on the indicated date, and will amend the plan as described below. Designated Person Accountable for Management Approval for Implementation Spill Prevention Review Signature: Signature: Name: John Jensen Name: Edward R. Schild Title: Manager, Hydro Services Review Date: Title: Director, Energy Production & Storage Review Date: Summary of SPCC Plan Amendments File No. 0186-634-03 August 25, 2008 Page ii

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 TABLE OF CONTENTS Page No. SPILL PREVENTION CONTROL AND COUNTERMEASURE PLAN MANAGEMENT APPROVAL AND CERTIFICATION... i SPILL PREVENTION CONTROL AND COUNTERMEASURE PLAN SPCC PLAN REVIEW AND AMENDMENT (PART 112.5)... ii 1.0 FACILITY INFORMATION AND CONTACTS (PART 112.7)... 1 1.1 EMERGENCY CONTACTS AND NOTIFICATIONS (PART 112.7 (A)(3)(VI))... 1 1.2 SPILL REPORTING PROCEDURES (PART 112.7 (A)(4))... 3 1.3 NON-EMERGENCY FACILITY CONTACTS AND INFORMATION... 4 2.0 REGULATORY AUTHORITY, DEFINITIONS, GENERAL REQUIREMENTS AND PURPOSE OF THE PLAN (PART 112.1, 112.2, 112.3(A) & (B), AND 112.7)... 5 2.1 PLAN ORGANIZATION AND CROSS REFERENCE (PART 112.7)... 5 3.0 GENERAL FACILITY DESCRIPTION (PART 112.7)... 8 3.1 COMPLIANCE WITH APPLICABLE SPCC REQUIREMENTS (PART 112.7 (A) AND 112.8 (A))... 8 3.2 LIST OF OIL STORAGE TANKS AND OIL-CONTAINING EQUIPMENT (PART 112.7 (A)(3)(I))... 9 3.3 DESCRIPTION OF OIL STORAGE AND OIL-CONTAINING EQUIPMENT (PART 112.7 (A)(3))... 10 3.3.1 Warehouse Area... 10 3.3.2 Powerhouse... 11 3.3.3 Lower Baker Dam... 11 3.4 DRAINAGE PATHWAYS AND DISTANCE TO NAVIGABLE WATERS (PART 112.8(B))... 12 3.4.1 On-Site Drainage... 12 3.4.2 Off-Site Drainage Pathways... 13 4.0 POTENTIAL SPILLS AND PREVENTION MEASURES... 14 4.1 FAULT ANALYSIS POTENTIAL SPILL EVENTS (PART 112.7(B))... 14 4.2 OIL SPILL CONTAINMENT SYSTEMS (PART 112.7(C))... 15 4.2.1 Warehouse Area... 15 4.2.2 Powerhouse... 15 4.2.3 Lower Baker Dam... 15 4.3 INSPECTIONS AND RECORD KEEPING (PART 112.7 (E))... 15 4.3.1 Oil-Filled Electrical Equipment... 16 4.3.2 Turbine Bearing System, Thrust and Guide at Powerhouse... 16 4.3.3 Aboveground Storage Tanks... 17 4.3.4 Miscellaneous Oil Storage Areas... 17 4.4 BRITTLE FRACTURE EVALUATION REQUIREMENTS (PART 112.7 (I))... 18 4.5 SECURITY (PART 112.7 (G))... 18 5.0 TRAINING AND DISCHARGE PREVENTION PROCEDURES... 19 File No. 0186-634-03 August 25, 2008 Page iii

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 TABLE OF CONTENTS (CONTINUED) Page No. 5.1 TRAINING (PART 112.7 (F))... 19 5.2 OIL LOADING AND HANDLING PROCEDURES (PART 112.7 (A)(3)(III), PART 112.7(H) AND PART 112.8(D))... 19 5.2.1 Transferring Fuel or Oil... 19 5.2.2 Handling Oil-Filled Equipment... 20 5.3 SIGNS, PLANS AND OIL CONTAINMENT KITS... 20 5.3.1 Oil Spill Notification, Signs and Plan Location... 20 5.3.2 Oil Spill Containment Kits... 20 6.0 SPILL EVENT: CONTAINMENT AND COUNTERMEASURE PROCEDURES (PART 112.7 (A)(3)(III)(IV))... 21 6.1 GENERAL PROCEDURES... 21 6.1.1 Identification... 21 6.1.2 Notification and Emergency Contacts... 21 6.1.3 Containment... 22 6.2 CLEANUP AND PCB SPECIAL HANDLING PROCEDURES (PART 112.7 (A)(3)(V))... 22 6.3 ASSESSING THE SPILL EVENT... 23 6.4 REPORT REQUIREMENTS... 23 6.4.1 Form... 23 6.4.2 Notification... 23 7.0 CONFORMANCE WITH STATE REQUIREMENTS (PART 112.7 (J))... 24 8.0 PLAN AMENDMENT BY THE REGIONAL ADMINISTRATOR (PART 112.4)... 25 List of Tables Table 1. Plan Elements and Cross Reference to 40 CFR (Part 112)... 6 Table 2. Non-Electrical Oil-Containing Equipment... 9 Table 3. Oil-Containing Electrical Equipment... 10 Table 4. Potential Spill Events (Part 112.7(B))... 14 List of Figures Figure 1. Vicinity Map Figure 2A. Site Plan Lower Baker Dam Figure 2B. Site Plan Lower Baker Powerhouse Figure 3. Site Plan Warehouse Area File No. 0186-634-03 August 25, 2008 Page iv

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 TABLE OF CONTENTS (CONTINUED) APPENDICES APPENDIX A CERTIFICATION OF THE APPLICABILITY OF THE SUBSTANTIAL HARM CRITERIA APPENDIX B PSE STANDARDS AND FORMS Oil Spill/SPCC/HAZ Training Roster PSE Form 1184 Spill Report Form PSE Form 1185 Weekly Facility Inspection Form PSE Form 1364 Monthly/Quarterly Facility Inspection Form PSE Standard Practice 0150.3100 Cleanup of Oil Spills PSE Standard Practice 0150.3150 Oil Sampling Procedures for Distribution Transformers and Oil-Filled Equipment Information Placard On Control Valve for Diked Secondary Containment Area APPENDIX C MAINTENANCE AND INSPECTION RECORDS Completed Weekly Facility Inspection Forms Completed Monthly Inspection Forms Completed Quarterly Inspection Forms Oil/Water Separator Maintenance Forms Other Operating Information as Appropriate File No. 0186-634-03 August 25, 2008 Page v

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 1.0 FACILITY INFORMATION AND CONTACTS (PART 112.7) The facility described in this Plan is under the primary responsibility of Puget Sound Energy Power Production. All questions relating to this SPCC Plan or facility should be directed to the appropriate contacts listed in this section. 1.1 EMERGENCY CONTACTS AND NOTIFICATIONS (PART 112.7 (A)(3)(VI)) Local Emergency Services Telephone Number: 911 (9-911 from internal phones) Puget Sound Energy Notifications Name: Title: Gordie Johnston Senior Environmental Scientist, Spill Response Coordinator Contact Information: 24-Hour Spill Pager: (206) 994-3186* *Contact this Number First in the Event of a Spill Name: Title: John Jensen Manager Hydro Services Contact Information: Telephone: (360) 424-2910 (external) 86-2910 (internal) Cell Phone: (360) 661-2280 Fax: (425) 462-3118 Name: Title: Lynn Bell Maintenance Supervisor Baker River Hydro Contact Information: Telephone: (360) 853-8341 (external) 86-3042 (internal) Cell Phone: (360) 305-0674 File No. 0186-634-03 Page 1 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 Name: Title: Byron Kurtz and Mike Donnelly Lower Baker Operator Contact Information: Telephone: (360) 853-1151 (external) 86-3013 (internal) Federal, State, and Local Emergency Contacts to be Notified Federal Notifications Name: National Response Center Contact Information: 24-hour Telephone: (800) 424-8802 Washington State Notifications Name: Washington Division of Emergency Management Contact Information: 24-hour Telephone: (800) 258-5990 File No. 0186-634-03 Page 2 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 1.2 SPILL REPORTING PROCEDURES (PART 112.7 (A)(4)) Contact the Spill Response Coordinator at (206) 994-3186 first for assistance regarding a spill or suspected spill. Spills must be reported to appropriate Federal, State and local agencies if they result in a release of oil from the facility or produce a sheen or discoloration on the surface of an adjacent water body. The following information needs to be readily available when reporting a spill from the facility: Name of Facility: Lower Baker Generation Plant Facility Main Telephone Number: (360) 853-8341 Location of Facility: 47256 Baker Dam Road Concrete, Washington 98237 County: Skagit GPS Coordinates: N 48 32 W 121 44 Date and Time of Release: Type of Material Released: Estimated Quantity of Material Released: Source of Material Released: All Media Affected by Release: Cause of Release: Damages or Injury Cause by Release: Actions Being Used to Control the Release: Is an Evacuation Needed?: People and Organizations that have been Contacted Regarding this Release: File No. 0186-634-03 Page 3 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 1.3 NON-EMERGENCY FACILITY CONTACTS AND INFORMATION Facility Owner Facility Operator Name: Puget Sound Energy Puget Sound Energy Lower Baker Generation Plant Address: P.O. Box 90868 PSE-11N 47256 Baker Dam Road City, State: Bellevue, Washington 98009 Concrete, Washington 98237 Telephone: (425) 462-3552 (360) 853-8341 Environmental Services Department Name: Title: Gordie Johnston Senior Environmental Scientist, Spill Response Coordinator Contact Information: Telephone: (360) 340-3716 Pager: (206) 994-3186 Name: Title: John Rork Puget Sound Energy Manager Environmental Services Contact Information: Telephone: (425) 456-2228 Cell Phone: (360) 340-3718 File No. 0186-634-03 Page 4 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 2.0 REGULATORY AUTHORITY, DEFINITIONS, GENERAL REQUIREMENTS AND PURPOSE OF THE PLAN (PART 112.1, 112.2, 112.3(A) & (B), AND 112.7) Regulations administered by the United States Environmental Protection Agency (EPA), and described in Title 40, Code of Federal Regulations, Part 112, dated July 17, 2002 (40 CFR, Part 112) require owners or operators of oil-handling or storage facilities to have Spill Prevention, Control and Countermeasure (SPCC) Plans in place to prevent the release of oil to navigable waterways. These requirements are applicable to non-transportation-related onshore or offshore facilities engaged in drilling, producing, gathering, storing, processing, refining, transferring, distributing, using, or consuming oil and oil products, which, due to their location, could reasonably be expected to discharge oil in quantities that may be harmful into or upon the navigable waters of the United States or adjoining shorelines. An SPCC Plan is a document that details the equipment, workforce, procedures, and steps to prevent, control, and provide adequate countermeasures to prevent the discharge of oil to navigable waters of the United States. The Plan must be prepared in writing and have the full approval of management at a level to commit the necessary resources to fully implement the Plan. Oil is defined as oil in any form, including, but not limited to fats, oils, or greases of animal, fish, or marine mammal origin; vegetable oils, including oils from seeds, nuts, fruits or kernels; and, other oils and greases, including petroleum, fuel oil, sludge, synthetic oils, mineral oils, oil refuse, or oil mixed with wastes other than dredged spoil. These regulations apply to oil storage or handling facilities that are not transportation related, that have total aboveground oil storage of more than 1,320 gallons, or total belowground storage capacity of more than 42,000 gallons that is not regulated under a state program. Containers of less than 55-gallon capacity are not included in the calculation of the capacity of a facility. This facility exceeds the 1,320 gallon threshold requiring an SPCC Plan. The compliance deadline for having an SPCC Plan in place that has been certified by a Professional Engineer (PE) and that is in conformance with the 2002 amendments to 40 CFR, Part 112 has been extended by the EPA as of May 2007. The new deadline for a facility SPCC Plan to comply with the 2002 amendments to 40 CFR, Part 112 is July 1, 2009. It is the policy of Puget Sound Energy and its contractors to recognize that oil contamination of the waters of the United States or the State of Washington is harmful. Therefore, it is required that emphasis be placed on oil spill prevention, and that appropriate engineering and safety procedures be used when dealing with oil and its associated equipment. 2.1 PLAN ORGANIZATION AND CROSS REFERENCE (PART 112.7) This Plan contains the required elements of an SPCC Plan as described in 40 CFR, Part 112. The Plan has been organized to meet the requirement of 40 CFR Part 112.7 (a)(5) that requires organizing portions of the Plan to make them readily usable in the event of an emergency. A cross reference of the sections of 40 CFR, Part 112, Subparts a and b to the sections contained in this document is included in this section. This cross reference also lists the facility characteristics that must be described in the Plan. The requirements of 112.9 through 112.15 (portions of Subpart a and Subpart c ) are not listed in this table. These requirements are for onshore oil production facilities or for facilities storing and File No. 0186-634-03 Page 5 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 handling animal or vegetable oils, and are not applicable to this facility. Other information contained in the Plan includes the following: Appendix A includes a copy of the Certification of the Applicability of the Substantial Harm Criteria, as described in 40 CFR, Part 112, Appendix C. Based on the requirements listed on this checklist, the facility is not required to maintain a Facility Response Plan (FRP). Appendix B includes copies of PSE Standards and forms referenced in the SPCC Plan. Appendix C includes copies of inspection and maintenance records for the oil storage structures at the facility. This appendix will be maintained by the individual at the facility responsible for spill prevention. Section in 40 CFR Part 112 Table 1. Plan Elements and Cross Reference to 40 CFR (Part 112) Description of Rule Section in SPCC Plan 112.1 General Applicability Section 2.0 112.2 Definitions Section 2.0 112.3(a) & (b) Requirement to Prepare and Implement an SPCC Plan Section 2.0 112.3(d) Requirement to Prepare and Implement an SPCC Plan Page i 112.4 Amendment of SPCC Plan by Regional Administrator Section 8.0 112.5 Amendment of SPCC Plan by Owners or Operators Page ii 112.7 General Requirements for SPCC Plans for all Facilities and all Oil Types 112.7(a) (1) & (2) 112.8(a) Discussion of Facility s Conformance with Rules and Applicable Requirements of Subpart A and B and Deviations from the Plan Requirements Section 2.0 Section 3.1 112.7(a) (3) Site Description and Facility Diagram Section 3.0 Figures 2A, 2B, 3 112.7(a) (3)(i) Type of Oil in Each Container & Storage Capacity Section 3.2 112.7(a) (3)(ii) Discharge Prevention Measures Procedures Section 5.2 112.7(a) (3)(iii) Discharge or Drainage Controls Secondary Containment Section 4.2 112.7(a) (3)(iii) Discharge or Drainage Controls Procedures to Control Discharges 112.7(a) (3)(iv) Countermeasures for Discharge Discovery, Response and Cleanup for Facility Personnel and Cleanup Contractor Section 6.0 Section 6.0 112.7(a) (3)(v) Methods of Disposal of Recovered Materials Section 6.2 112.7(a) (3)(vi) Emergency Contact and Notification Information Section 1.1 112.7(a)(4) Procedures and Required Information Regarding a Discharge Section 1.2 112.7(b) Fault Analysis Section 4.1 112.7(c) Secondary Containment Section 4.2 112.7(d) Contingency Planning Not Used 112.7(e) & 112.8(c)(6) Inspections, Tests, and Records Section 4.3, Appendix C File No. 0186-634-03 Page 6 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 Table 1. Plan Elements and Cross Reference to 40 CFR (Part 112) (Continued) Section in 40 CFR Part 112 Description of Rule Section in SPCC Plan 112.7(f) Employee Training and Discharge Prevention Procedures Section 5.1 112.7(g) Security (excluding oil production facilities) Section 4.5 112.7(h) Loading/unloading (excluding offshore facilities) Section 5.2 112.7(i) Brittle Fracture Evaluation Requirements Section 4.4 112.7(j) Conformance with State Requirements Section 7.0 112.8(b) Facility Drainage Section 3.4 112.8(c) Bulk Storage Containers Sections 3.3 and 4.2 112.8(d) Fuel Transfer Operations, Pumping & Facility Process Section 5.2 File No. 0186-634-03 Page 7 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 3.0 GENERAL FACILITY DESCRIPTION (PART 112.7) The Lower Baker Generation Plant (Facility) is located below the Lower Baker Dam at 47256 Baker Dam Road in Concrete, Washington. The Facility is located at latitude N 48 32, longitude W 121 44. The location of the Facility is shown on Figure 1. The Facility is a hydro-electrical power Generation plant. The Facility consists of a water intake area at the Lower Baker Dam, Powerhouse Unit Number 3 (Numbers 1 and 2 demolished 1965) and the Warehouse area. The Lower Baker office and visitor center are located at the Warehouse area. See Figures 2A, 2B and 3. Water enters the intake at the Lower Baker Dam and flows approximately 1,400 feet through a 22-footdiameter underground main pressure tunnel to the Powerhouse. The Powerhouse consists of the generator level, turbine level and sump level and contains a single generator turbine unit. A 70,000 kva transformer is housed in the transformer room on the generator level of the Powerhouse. The Lower Baker visitor center, office and shops are located at the Warehouse area approximately 2,000 feet south of the Powerhouse. Facilities at the Warehouse area where oil is stored, handled or used include the Warehouse Garage, Fueling Station, Diesel Generator and Oil Storage Trailers. The locations of areas where oil is stored and/or handled are shown on Figures 2A, 2B and 3. To ensure and maintain the Facility s reliability and performance, it is visually inspected weekly or more frequently by on-site Turbine Personnel from the Energy Production Department. The Energy Production Department log is kept in the office located at the Lower Baker office (Figure 3). Information provided by PSE indicates that the Generation Plant was designed and constructed in accordance with the standard of care for engineering and construction practices at the time of their design and with the approval of the respective government agencies and the general public. 3.1 COMPLIANCE WITH APPLICABLE SPCC REQUIREMENTS (PARTS 112.7 (A) AND 112.8 (A)) Sections of 40 CFR Part 112.7 that are applicable to this SPCC Plan are Subparts a and b of the rule, and a summary of operations meeting these requirements is as follows. A listing of the criteria applicable to this Facility may be found in Table 1, and detailed information regarding each of these criteria may be found in the report sections described in Table 1. The Facility is designed to prevent oil releases during operation or maintenance of the Facility. Oil is stored in steel containers that are appropriate for the type of oil being stored in them, and the containers are kept on sufficiently impervious floors with appropriate secondary containment consisting of berms or dikes that will control a release of any stored oil. Figures showing the location of oil-containing equipment (Figures 2A, 2B and 3) and a listing of potential releases (Table 4) are presented in the SPCC Plan. Oil transfers, loading, unloading and other oil-handling activities are manned operations, and transfers are performed at dedicated oil-handling facilities, and/or are performed using drip pans and/or sorbent pads to control any potential spills. Spill kits are located at the Lower Baker Dam, Powerhouse and Warehouse File No. 0186-634-03 Page 8 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 areas. As part of the oil-handling program, signs are posted to warn personnel to disconnect hoses and secure containers before transport. Potential spill events at the Facility have been summarized and a prediction of the volume, rate of flow and direction have been prepared. Discovery of spills will occur quickly. Oil-containing equipment is routinely inspected, typically on a daily basis. Should a catastrophic failure of a piece of electrical equipment or rotating machinery occur at any time, the loss of Generation capacity would immediately affect the distribution system. The operators of the distribution system would be able to quickly direct emergency responders to the site in this event. Cleanup of minor spills would be performed by Facility personnel, whereas major spills would be controlled and cleaned up by qualified contractors. Contact information is detailed at the beginning of this SPCC Plan, and includes appropriate emergency contacts, including Facility personnel, cleanup coordinators, and regulatory agencies, and a description of information required during a release is provided. Inspections and tests are routinely performed on oil-filled equipment and records of these activities are maintained as part of this SPCC Plan. Visual inspection is performed on all oil-filled equipment, and oilfilled pressure vessels are pressure tested in addition to being visually inspected. Smaller non-pressurized oil containers are visually inspected. Nondestructive testing is not performed on these containers as part of normal industry procedures, and because of the low container stresses associated with the typically small volumes of oil used in these non-pressure applications, visual inspection is adequate to evaluate container condition. No field-fabricated oil containers subject to brittle fracture inspection requirements are used at this Facility. Oil-handling personnel receive training regarding the SPCC Plan on an annual basis. All areas used for oil storage and handling at this Facility are located inside fenced areas. 3.2 LIST OF OIL STORAGE TANKS AND OIL-CONTAINING EQUIPMENT (PART 112.7 (A)(3)(I)) The following oil-containing equipment is present at the Facility: Table 2. Non-Electrical Oil-Containing Equipment (55 gallons and greater) Oil Storage/Oil-Containing Equipment Quantity Total Storage Capacity (gallons) Contents Warehouse Area 55-gallon drums in Warehouse garage 2 110 Used oil 5-gallon buckets in Warehouse garage 10 50 Used oil 2,500-gallon USTs at fueling station 2 5,000 Gasoline and diesel 55-gallon drums in Oil Storage Trailers 20 1,100 Solvents 55-gallon drums in Oil Storage Trailers 7 385 Kerosene, waste flammable liquids Diesel Generator 1 474 Diesel Powerhouse AST (outside Powerhouse) 1 100 Diesel File No. 0186-634-03 Page 9 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 Table 2. Non-Electrical Oil-Containing Equipment (55 gallons and greater) (Continued) Oil Storage/Oil-Containing Equipment Quantity Total Storage Capacity (gallons) Contents Penstock butterfly valve 1 250 Hydraulic oil Turbine hydraulic governor 1 465 Hydraulic oil Turbine thrust and guide bearings 1 745 Turbine oil Lower Baker Dam AST 1 1,200 Hydraulic ram oil Diesel Generator 1 100 Diesel Hydraulic Gate Car 1 65 Hydraulic Oil Storage Subtotal: Aboveground Non-Electrical Oil-Containing Equipment: Belowground Non-Electrical Oil-Containing Equipment: 5,094 gallons 5,000 gallons The location of this equipment is shown on Figures 2A, 2B and 3. Table 3. Oil-Containing Electrical Equipment (55 gallons and greater) Oil Storage/Oil Containing Equipment Powerhouse Quantity Total Storage Capacity (gallons) Contents Step-up transformer 1 7,890 Mineral oil Storage Subtotal: Oil-Containing Electrical Equipment: Total Facility Oil Storage: 7,910 gallons 18,004 gallons 3.3 DESCRIPTION OF OIL STORAGE AND OIL-CONTAINING EQUIPMENT (PART 112.7 (A)(3)) 3.3.1 Warehouse Area 3.3.1.1 Warehouse Garage An oil storage area is located in the west corner of the Warehouse garage. The area is secured behind a locked chain link fence and contains two 55-gallon drums and approximately ten 5-gallon drums, all containing used oil. The drums are contained on spill-containment pallets and the garage area has a 3-inch-high curb, creating a total containment capacity of 120 gallons. 3.3.1.2 Fueling Station The fueling station contains two USTs, each with a capacity of 2,500 gallons. One UST contains gasoline and the other contains diesel. The USTs are fiberglass double-walled USTs, with interstitial leak detection that sounds an alarm at a panel approximately 40 feet north of the USTs. File No. 0186-634-03 Page 10 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 3.3.1.3 Oil storage Trailers Two oil storage trailers are located east of the Core Building. The trailers are steel trailers built by Mckinney Trailer in Seattle, Washington, and are designed to be used as secondary containment. The oil storage trailers contain approximately 20 55-gallon drums of solvents, various drums of solvents, and seven 55-gallon drums of miscellaneous petroleum products such as kerosene, waste flammable liquids, hydraulic oil, gear box lube and 10-weight oil. 3.3.1.4 Diesel Generator A 275 kilowatt emergency diesel generator is located outside the east side of the Warehouse Garage. The generator and fuel tank was built and delivered as a single unit, and is sited on a concrete pad surrounded by gravel. The double-walled 474-gallon diesel fuel tank is located beneath the generator. 3.3.2 Powerhouse 3.3.2.1 AST Outside Powerhouse An emergency generator is located south of the Powerhouse. The emergency generator is connected via aboveground piping to a 100-gallon diesel AST. 3.3.2.2 Penstock Butterfly Valve The penstock butterfly valve at the Powerhouse contains approximately 250 gallons of hydraulic oil. 3.3.2.3 Turbine Hydraulic Governor One turbine hydraulic governor, circulating approximately 465 gallons of hydraulic oil, is located in the Powerhouse. 3.3.2.4 Turbine Thrust and Guide Bearings The turbine thrust and guide bearing system circulates 745 gallons of turbine oil. 3.3.2.5 Step-up Transformer The main step-up transformer is housed in the transformer room at the Powerhouse. The transformer contains approximately 7,890 gallons of mineral oil. 3.3.3 Lower Baker Dam 3.3.3.1 Hydraulic Ram Oil AST One 1,200-gallon hydraulic ram oil AST is located near the ceiling of the gate house at the Lower Baker Dam. The AST is connected to two hydraulic oil cylinders used to control the spill gate. 3.3.3.2 Diesel Generator A diesel generator located in the emergency generator house includes a double-walled 100-gallon fuel tank. 3.3.3.3 Hydraulic Gate Car Wooden and metal gates at the top of Baker Dam are raised and lowered using a hydraulic gate car that moves on rails along the top of the dam. The capacity of the hydraulic system is approximately 65 gallons. The hydraulic reservoir is located inside the car, and a drip pan is located under the hydraulic reservoir. Car operation is always a manned operation. File No. 0186-634-03 Page 11 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 3.4 DRAINAGE PATHWAYS AND DISTANCE TO NAVIGABLE WATERS (PART 112.8(B)) 3.4.1 On-Site Drainage 3.4.1.1 Warehouse Area The oil storage area in the Warehouse garage is a curbed containment area with a capacity of approximately 120 gallons. The storage area is covered and does not contain a drain. Drums are kept on spill-containment pallets. Three catch basins are located in a paved area approximately 100 feet west of the oil storage room. The catch basins reportedly never flood; however, dye tests have been inconclusive as to the outfall for the catch basins. Gravel surrounds the concrete pad for the diesel generator. An unlined culvert is located approximately 20 feet southeast of the concrete pad. The culvert drains approximately 300 feet east to the Baker River. There is no on-site drainage system for the fueling station area or the oil storage trailers. The fueling station is paved and the oil storage trailers are parked on gravel. Off-site drainage is described in Section 3.4.2. 3.4.1.2 Powerhouse The step-up transformer at the Powerhouse is located inside a curbed containment area with a capacity of 411 gallons. Two drains lead from the containment area to a vault of 9,896-gallon capacity (125 percent of the capacity of the transformer). The vault contains a drain, which has been permanently plugged. Water in the vault is checked for oil before being pumped out by a vacuum truck. The generator and turbine floors of the Powerhouse drain to the sump at the Powerhouse. The sump has a capacity of approximately 4,750 gallons and is equipped with an oil skimmer and alarm system. The oil skimmer operates approximately 15 to 60 minutes every two hours to remove any floating oil in the sump. Sump pumps and float switches keep the water level in the sump at least 1.2 feet above the sump floor and at least 9 feet below the top of the sump. The skimmer collects oil in a 55-gallon drum located on a spill containment pallet. Discharge is from the bottom of the sump, outside the Powerhouse, to the river below. A sensor continuously monitors the sump and sounds an alarm if the oil level is 1/4-inch thick or more. The sensor alarm also pages the operator in the event oil is detected in the sump. The sump pumps stop pumping when the water elevation is approximately 1.2 feet above the floor of the sump, so any accumulation of oil in the sump from a spill would likely trigger an alarm before oil is drawn into the pump system. In the event of a spill, the oil detection system will page the operator, who will respond within a 30-minute timeframe. The operator may then manually control the pumps from the sump room with the pump starting controls on the pump start boxes. 3.4.1.3 Lower Baker Dam The Lower Baker Dam does not have an on-site drainage system. Flows at the dam flow overland directly into Lake Shannon or the Baker River. File No. 0186-634-03 Page 12 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 3.4.2 Off-Site Drainage Pathways 3.4.2.1 Warehouse Area The off-site drainage pathway for the three catch basins in the paved area west of the oil storage area is currently unknown. The oil storage area should not drain to the catch basins because of the berm at the storage area. Oil spills from the diesel generator would flow into an unlined culvert and to the Baker River, approximately 320 feet away. The fuel station and oil storage trailer area would drain overland approximately 50 feet south against a 4-foot-high soil berm. The soil berm measures approximately 400 feet long. 3.4.2.2 Powerhouse The off-site drainage pathway from the Powerhouse would be overland approximately 10 feet west into the Baker River. 3.4.2.3 Lower Baker Dam The off-site drainage pathway from the oil-containing devices at the dam would be overland, north or south directly into Shannon Lake or the Baker River. File No. 0186-634-03 Page 13 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 4.0 POTENTIAL SPILLS AND PREVENTION MEASURES 4.1 FAULT ANALYSIS POTENTIAL SPILL EVENTS (PART 112.7(B)) The probability of a major uncontrolled oil spill at the Facility is low. Although oil storage tanks and several single pieces of electrical equipment contain large quantities of oil, the containment systems at the Facility and associated structures are designed to contain potential spills. Any significant oil spill probably would be caused by a major structural failure. More likely potential spill events would be: A slow leak from a piece of stored equipment due to a failed gasket or seal, cracked bushing, or a leaking oil-stop plug, fitting, valve or similar item. An event of this nature would be readily detectable during routine inspection or day-to-day activities, and allow ample response time for containment. A spill of oil during repair or maintenance of equipment on site. An event of this nature would be quickly detected by the personnel performing the repair or maintenance, and response would be rapid. Potential spill events at the Facility are summarized in Table 4. Source Warehouse Area Containers in Warehouse garage Containers in Oil storage trailers Type of Failure Table 4. Potential Spill Events (Part 112.7(B)) Volume (gallons) Maximum Rate (gallon/hr) Direction of Flow Containment Rupture; leakage 55 55 None Contained in curbed area Rupture; leakage 55 55 None In oil-containment trailers Diesel Generator Rupture; leakage 474 474 West Double-walled tank Powerhouse AST (outside Powerhouse) Penstock butterfly valve Turbine hydraulic governor Generator thrust and guide bearings Rupture; leakage 100 100 West Double-walled tank Rupture; leakage 250 250 To sump Sump Rupture; leakage 465 465 To sump Sump Rupture; leakage 745 745 To sump Sump Step-up transformer Rupture; leakage 7,890 7,890 To vault Vault Lower Baker Dam AST Rupture; leakage 1,200 1,200 West Metal drip pan and building Diesel generator Rupture; leakage 180 100 West Double-walled tank Hydraulic gate car Rupture; leakage 65 65 Down to River or Lake Drip pan; car floor File No. 0186-634-03 Page 14 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 4.2 OIL SPILL CONTAINMENT SYSTEMS (PART 112.7(C)) Containment systems for each building and oil storage structure are described in this section. 4.2.1 Warehouse Area The two 55-gallon drums in the oil storage area are kept on spill-containment pallets. The oil storage area is a bermed area with a capacity of approximately 120 gallons. The diesel generator fuel tank is a doublewalled fuel tank. The oil storage trailers are steel trailers built by Mckinney Trailer in Seattle, Washington, and the floor of the trailer is designed to function as secondary containment. 4.2.2 Powerhouse The step-up transformer at the Powerhouse is located inside a curbed containment area with a capacity of 411 gallons. Two drains lead from the containment area to a sealed vault of 9,896-gallon capacity, or 125 percent of the capacity of the transformer. All other areas of the Powerhouse drain to the sump. The sump has a capacity of approximately 4,750 gallons and is equipped with an oil skimmer and alarm system as described in Section 3.4.1.2. 4.2.3 Lower Baker Dam The 1,200-gallon AST in the gatehouse at the dam uses the gatehouse building as secondary containment. A 6-foot x 2-foot welded steel plate was fabricated and installed over the double door and small hole in the wall to completely seal the building. The gatehouse building allows water from Shannon Lake to seep into the gatehouse, but this water does not escape the building. Any release from the 1,200 gallon AST would be contained in the gatehouse. Water in the gatehouse house is pumped out as needed. The gatehouse building is inspected daily by operators. The diesel generator in the emergency generator house contains a 100-gallon double-walled fuel tank. The hydraulic system in the hydraulic gate car has a 65-gallon capacity. The system utilizes steel supply and return lines. Operation of the gate car is always a manned operation, and the hydraulic system contains an audible low-oil alarm system, so that a spill would most likely be immediately noticeable by the operator. There is a drip pan located under the hydraulic reservoir. 4.3 INSPECTIONS AND RECORD KEEPING (PART 112.7 (E)) Inspections of lubrication systems, electrical equipment, and oil storage systems are performed on a regular basis, typically daily. Inspection procedure, any required physical testing of oil-containing equipment and record keeping requirements for oil-containing equipment and stored oil are described in the following subsections. File No. 0186-634-03 Page 15 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 4.3.1 Oil-Filled Electrical Equipment Oil-filled electrical equipment at the Facility is visually inspected on a regular basis, typically daily, by Facility personnel for overall condition to include any leaks, damage or other conditions that could potentially contribute to a release. Inspected equipment includes the following: Step-up transformer at Powerhouse Turbine grounding transformer at Powerhouse Areas to be inspected include the sides and bottoms of the equipment and any bushings or plugs on the equipment. These areas are evaluated to see if oil is present and oil levels are checked using the sight glass in the equipment. Mountings, supports, brackets and bases for oil-filled equipment will be inspected for any damage, deterioration, corrosion or other evidence of potential failure. Any damage or deterioration of the mounting system will be reported to the Maintenance Supervisor for the Facility, and repaired or replaced as necessary. Any leakage from the system is noted and cleaned up with absorbent pads as necessary. These losses and any oil added to the system are recorded on a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility to evaluate if oil may be leaking from the turbine lubrication system at some unseen location. Visual inspection of the oil-filled electrical equipment is the only means of inspection performed on this type of equipment. The equipment is non-pressurized, and other means of testing of the physical integrity of electrical equipment housings are not industry practice. It is our opinion that visual inspection of this equipment is adequate to evaluate its condition. Any other maintenance and inspection activities will be documented using a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility. Copies of the completed inspection form are maintained for a period of 5 years in Appendix C of this SPCC Plan. 4.3.2 Turbine Bearing System, Thrust and Guide at Powerhouse The turbine bearing system in the Generation plant is visually inspected on a regular basis, typically daily, by Facility personnel for leaks and oil levels. Areas to be inspected are piping, piping connections, bearing housings, shaft seals, gasketed joints in oil-filled equipment, lubrication oil pressure vessels and any other oil-filled equipment connected to the turbine lubrication system. Mountings, supports, brackets and bases for oil-filled equipment will be inspected for any damage, deterioration, corrosion or other evidence of potential failure. Any damage or deterioration of the mounting system will be reported to the Maintenance Supervisor for the Facility and repaired or replaced as necessary. Any leakage from the system is noted and cleaned up with absorbent pads as necessary. These losses and any oil added to the system are recorded on a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility to evaluate if oil may be leaking from the turbine lubrication system at some unseen location. Oil is periodically changed from the system, and oil changes are also documented on an inspection form. Copies of these completed inspection forms are maintained in Appendix C of this SPCC Plan. File No. 0186-634-03 Page 16 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 The sump at the lower level of the Generation plant includes an oil skimmer system, as well as a floating oil detection sensor. The oil skimmer system continuously removes any oily sheen that may be present in the sump and collects the oil in a 55-gallon drum adjacent to the sump. A sensor continuously monitors the sump and sounds an alarm if the oil level is 1/4-inch thick or more. The sensor alarm also pages the operator in the event oil is detected in the sump. The sump pumps stop pumping when the water elevation is approximately 1.2 feet above the floor of the sump, so any accumulation of oil in the sump from a spill would likely trigger an alarm before oil is drawn into the pump system. In the event of a spill, the oil detection system will page the operator, who will respond within a 30-minute timeframe. The operator may then manually control the pumps from the sump room with the pump starting controls on the pump start boxes. Pressure vessels that hold reserve oil in the turbine system are pressure tested every 10 years in accordance with American Petroleum Institute (API) 572 to evaluate their suitability for use. Records of this testing provided by the subcontractor performing the testing will be maintained in Appendix C of this SPCC Plan. Pressure testing of the remainder of the lubrication system would likely damage seals and gaskets in the system, and other methods of non-destructive testing would reveal little more information that could be discovered using visual inspection procedures. It is our opinion that visual inspections of the balance of the lubrication system are adequate to evaluate its condition. Any other maintenance and inspection activities will be documented using a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility. Copies of the completed inspection form are maintained for a period of 5 years in Appendix C of this SPCC Plan. 4.3.3 Aboveground Storage Tanks Visual inspections of the gate house AST are conducted frequently, typically daily, to check for leaks, damage, corrosion or any other conditions that could result in an uncontrolled release of oil. This inspection is documented using a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility. Copies of the completed inspection records are kept at the Lower Baker office. 4.3.4 Miscellaneous Oil Storage Areas Other stored oil and oil-filled equipment at the Generation Plant are inspected frequently by Facility personnel for overall condition to include any leaks, damage or other conditions that could potentially contribute to a release. Visual inspections are performed on stored oil drums, containers and other oil-filled equipment. Areas inspected include the sides and bottoms of the containers, and any drains, fittings or seams in the containers or equipment. If leaks, corrosion dents, or other indications of potential leakage are observed, appropriate action will be taken. Leaking containers will be plugged and/or placed on secondary containment. Containers that have conditions indicative of potential leakage will be placed on secondary containment, and replaced as soon as possible. Any oil will be cleaned up using the procedures described in PSE Standard 0150.3100, Cleanup of Oil Spills. File No. 0186-634-03 Page 17 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 Visual inspection of these types of oil-filled containers (drums and similar non-pressure containers) is the only means of inspection performed on this type of equipment. The equipment is non-pressurized, and other means of testing of the physical integrity of these types of containers are not industry practice. It is our opinion that visual inspection of this equipment is adequate to evaluate its condition. Inspections are documented using a PSE Weekly Facility Inspection form (Form 1185) or an equivalent form developed by the Facility. Copies of the completed inspection form are maintained for a period of 5 years in Appendix C of this SPCC Plan. 4.4 BRITTLE FRACTURE EVALUATION REQUIREMENTS (PART 112.7 (I)) The Facility does not use any field-constructed aboveground containers. All electrical devices and oil containers used at the Facility are commercially made in a factory environment and are not subject to evaluation for failure by brittle fracture. Should any electrical device or oil container appear to be developing fractures or cracking in its metal case, the device or container will be immediately removed from service. 4.5 SECURITY (PART 112.7 (G)) The Facility is manned 8 hours per day, Monday through Friday, and an operator is within 15 minutes of the Facility 7 days per week, 24 hours per day. Measures taken to prevent trespassing, vandalism, and sabotage include, but are not limited to, the following: Security fences or water surrounding the Facility site. Building and yard lights. Warning devices: Danger and No Trespassing signs. Locks on gates and buildings after hours. Pump shutoff switches located near the fueling station to shut off pumps in the event of a spill. File No. 0186-634-03 Page 18 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 5.0 TRAINING AND DISCHARGE PREVENTION PROCEDURES 5.1 TRAINING (PART 112.7 (F)) The Hydro Services Manager or an individual designated by the Hydro Services Manager are responsible for providing an annual training program for Facility personnel regarding SPCC measures. Spill prevention training will be provided on an annual basis to all personnel that are involved in handling oil. The training program includes the information included in this Plan, methods and procedures used to prevent, control, and cleanup an oil spill, and a review of pollution control regulations. Training will also include describing any known releases or failures at the Facility, lessons learned from these events, updates on Facility equipment and new precautions to be observed. The following PSE Standards found in Appendix B shall be included as a part of the training: 0150.3100, Cleanup of Oil Spills 0150.3150, Oil Sampling Procedures for Distribution Transformers and Oil-Filled Equipment Other PSE Standards and Specifications also may be included as part of the training. A record of additional standards that are used for training will be maintained in Appendix C. The examples shown in the Standards are general ways of containing an oil spill. The exact methods employed will depend on local conditions and circumstances. All referenced standards or specifications are attached to this Plan. Training programs and periodic briefings include review of this Plan and describe actual experiences, recent spill events or failures, and new preventive control and cleanup measures. The individual responsible for training shall maintain a copy of the training roster in Appendix C of this Plan. A sample training roster is included in Appendix B. 5.2 OIL LOADING AND HANDLING PROCEDURES (PART 112.7 (A)(3)(III), PART 112.7(H) AND PART 112.8(D)) It is stressed to all personnel that an essential part of oil spill prevention is being alert for signs of leaks and the prevention of spills during their daily activities. This is accomplished by being observant and by performing regular inspections at the Facility. These inspection procedures, as required by 40 CFR Part 112.8(d)(4) are described in detail in Section 4.3. Leaks or spills shall be immediately reported in accordance with Section 1.1 and the Section 6.1.2 of this document, and appropriate response activities shall be started immediately. 5.2.1 Transferring Fuel or Oil Tank truck offloading occurs adjacent to the USTs at the Fuel Island area and on the dam structure at the Generation Plant parking level using remote fill ports for the oil tanks. No containment has been provided for offloading. Tank truck offloading procedures meet the minimum requirements and regulations of the Washington State Department of Transportation (WSDOT). Truck drivers observe the tank throughout offloading procedures and drains and outlets on tank trucks are checked for leakage before offloading or departure. File No. 0186-634-03 Page 19 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 5.2.2 Handling Oil-Filled Equipment Spill kits will be readily available when handling oil drums and oil-filled equipment. Drums or oil-filled equipment will be sealed, checked for leaks, and if necessary, re-sealed or tightened. Containers or equipment will be properly secured before they are loaded and moved. 5.3 SIGNS, PLANS AND OIL CONTAINMENT KITS 5.3.1 Oil Spill Notification, Signs and Plan Location In Case of Oil Spill signs are be posted along the inside of perimeter fences and in any oil storage or distribution area, and emergency spill contact stickers have been placed on all vehicles at the Facility. Copies of relevant standards are attached to this Plan. The SPCC Plan shall be kept in the following locations: The Lower Baker office. The Generation Plant. The Plan originals are kept on file in the Environmental Services Department. 5.3.2 Oil Spill Containment Kits Oil spill equipment and materials are stored in Small Oil Spill Kits, which are stored at various locations throughout the Facility. Kits shall be readily accessible and shall not be hidden or covered with other materials or used for anything other than their intended purpose. Additional kits and materials are available through General Stores. File No. 0186-634-03 Page 20 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 6.0 SPILL EVENT: CONTAINMENT AND COUNTERMEASURE PROCEDURES (PART 112.7 (A)(3)(III)(IV)) 6.1 GENERAL PROCEDURES Containment and countermeasure actions must start immediately after a spill is discovered. The primary objective will be to contain spilled oil within the immediate area, and prevent its entry into the Facility drainage system, the public drainage system or the navigable waters of the United States. This objective shall be met while maintaining proper health and safety procedures. General procedures to be followed in any and all cases of an oil spill event are described below. 6.1.1 Identification Upon discovery of a spill during normal operations or as a result of an alarm at the Facility, the discoverer shall immediately evaluate whether the spill can be approached safely. From a safe distance, the discoverer shall evaluate the nature and extent of the spill. If possible and safe, the discoverer shall identify the source and stop the leak. The discoverer then shall initiate immediate action to contain the spill, and shall make the notifications described in Section 1.1 or the following section. 6.1.2 Notification and Emergency Contacts The following notifications shall be made upon discovery of a spill: Notify the 24-hour spill response coordinator number (206) 994-3186. Notify the Maintenance Supervisor, Lower Baker Operator or designee Phone numbers for the maintenance supervisor are (360) 853-8341, (internal) PSE extension at 86-3042 or cell phone at (360) 853-8608. Phone numbers for the Lower Baker Operator are (36) 853-8608 or internal PSE extension at 86-2033. The local fire department shall be notified by the Power Generation Serviceman or designee if there is a potential fire hazard (Phone 911 [external] or 9-911 [internal]). The spill response coordinator will advise on procedures for handling the spill. Generally, a spill contractor will respond if a spill meets the following criteria: The spill is greater than 5 gallons; The spill enters the Facility drainage system; The spill is from PCB-containing equipment and affects underlying earth, asphalt or concrete; or The spill flows off PSE property. The spill response coordinator shall contact the appropriate State and Federal agencies as required. The spill response coordinator or Environmental Services shall be the only contact with State and Federal agencies. File No. 0186-634-03 Page 21 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 6.1.3 Containment Personnel from the Facility and the cleanup contractor will use the following general actions and PSE guidelines for spill control and containment. Facility personnel will use available spill kits and equipment stored at the Facility. The spill response coordinator will bring material and equipment as required to control and/or contain the spill. This equipment may be limited to hand tools and sorbent media for any spill that may be reasonably anticipated to occur at this Facility. The spill response coordinator or contractors have other equipment available, up to and including heavy earthmoving equipment and watercraft capable of recovering spills from waterways in the event of a catastrophic failure at the Facility. Confine and prevent any further spread of the oil (see PSE Standard 0150.3100). Plug nearby storm drains. Block catch basins by putting plastic sheeting under the catch basin grates and/or by building diversion dikes of absorbent or other material around the catch basin. Reduce or eliminate the spread of oil by using drain system isolation valves, dikes, channels, dams and/or oil absorbent material (see PSE Standard 0150.3100). Stop the oil leak at its source, for example: Plug the leak with available material; If a transformer or other piece of equipment is leaking, it may be possible to turn it on its side or upside down to raise the point that is leaking; or If rupture or leak cannot be plugged, use bins, pans, barrels or containers to catch the oil if possible. After the spill has been contained, the spill response coordinator will coordinate cleanup of the material. 6.2 CLEANUP AND PCB SPECIAL HANDLING PROCEDURES (PART 112.7 (A)(3)(V)) A representative of the spill response coordinator shall direct the collection of spilled oil and removal of contaminated soils and other materials. Spilled oil and contaminated media will be transported to PSE s South King County Waste Management Facility as generally described in Standard 0150.3100. Disposal of spilled oil and contaminated materials shall be arranged at the South King County Waste Management Facility, which is a licensed moderate-risk waste facility (King County Permit Number PR0064285, RCRA ID WAD000006569). Recovered oil, contaminated soil or contaminated water will be disposed of by recycling, thermal treatment and/or land filling at permitted facilities as appropriate. Special handling is required for a spill event originating from containers or electrical items that are labeled as containing PCB or PCB-contaminated oil. The label used for identifying such containers and items is shown in Standard 0150.3125; cleanup is outlined in Standard 0150.3100 Cleanup of Oil Spills. Any oil-filled device of unknown PCB content must be assumed to be PCB contaminated and handled as such. The spill response coordinator shall be notified when the earth, concrete or asphalt under a leaking PCB-containing device has been contaminated. The spill response coordinator will verify for adequacy of cleanup. File No. 0186-634-03 Page 22 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 6.3 ASSESSING THE SPILL EVENT In accordance with Section 6.1.2, the spill response coordinator shall be notified of the spill event. A spill response coordinator shall perform any environmental sampling necessary to evaluate areas affected by the spilled oil, assess and quantify the potential environmental damage, and collect necessary information that may include soil and water samples to confirm that the extent of spilled material has been identified and spilled material has been cleaned up. 6.4 REPORT REQUIREMENTS 6.4.1 Form Report oil spills using the Oil Spill Report form (PSE Form 1184). 6.4.2 Notification A copy of the Oil Spill Report, including the test results and a map identifying the spill location, if prepared, must be forwarded to the Environmental Services Department in a timely fashion. Environmental Services will manage the required State and Federal spill notification and follow-up requirements. File No. 0186-634-03 Page 23 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 7.0 CONFORMANCE WITH STATE REQUIREMENTS (PART 112.7 (J)) Oil spills in the State of Washington are regulated under the Revised Code of Washington (RCW), Chapters 90.48 and 90.56, which are enforced by the Washington State Department of Ecology (Ecology). RCW 90.48.080 prohibits the discharge of polluting materials into the waters of the State, and RCW 90.56 describes the spill prevention and cleanup process. There is no de minimus release amount defined in these regulations. Rather, any amount of oil that degrades the waters the State constitutes a release. Ecology typically considers the creation of a visible sheen on the water as a spill. The goal of this Plan is consistent with the objective of RCW 90.48.080, and the items presented in this Plan, including prevention planning, Facility design and operation, spill response and spill notification requirements are in general conformance with the requirements of RCW 90.56. The conformance of the Facility with the requirements of 40 CFR Part 112 as discussed in Section 3.1 of this document addresses the requirements of RCW 90.56. File No. 0186-634-03 Page 24 August 25, 2008

Puget Sound Energy Lower Baker Generation Plant 47256 Baker Dam Road Concrete, Washington 98237 8.0 PLAN AMENDMENT BY THE REGIONAL ADMINISTRATOR (PART 112.4) No spill events reportable under the Clean Water Act or Washington State law have occurred at the Facility in the past five years. In the event of a spill resulting in discharges of more than 1,000 gallons of oil in a single discharge, or more than 42 gallons of oil in each of two discharges occurring in a single year, the following information must be submitted to the EPA Regional Administrator and Ecology for their review within 60 days from the time of such a release or releases(s): 1. Name of the facility; 2. Your name; 3. Location of the facility; 4. Maximum storage or handling capacity of the facility and normal daily throughput; 5. Corrective action and countermeasures you have taken, including a description of equipment repairs and replacements; 6. An adequate description of the facility, including maps, flow diagrams, and topographical maps, as necessary; 7. The cause of discharge, including a failure analysis of the system or subsystem in which the failure occurred; 8. Additional preventive measures you have taken or contemplated to minimize the possibility of recurrence; and 9. Such other information as the Regional Administrator and State Department of Ecology may reasonably require pertinent to the Plan or discharge. The Plan will be amended, if required, after review of the information submitted above by the EPA Regional Administrator or Ecology. The Regional Administrator may require that the Plan be amended if he finds that it does not meet the requirements of this part or that amendment is necessary to prevent and contain discharges from the facility. File No. 0186-634-03 Page 25 August 25, 2008

SITE Path: 0\0186634\00\GIS\018663400_T6_LB_FIG-1.mxd Map Revised: June 06, 2005 Office: TAC Data Sources: Interstates, state routes, and roads from TIGER 2000. County boundaries, cities, and waterbodies from Department of Ecology. All locations are approximate. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Lambert Conformal Conic Washington State Plane North North American Datum 1983 0 3,000 6,000 Feet Note: This drawing is for informational purposes. It is intended to assist in showing features discussed in an attached document. 543 5 Skagit County 20 San Juan County 11 9 525 9 529 Island County 20 VICINITY MAP FIGURE 1 9 County 20 Whatcom 530 530 Snohomish County Okanogan County Chelan County